./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label48.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:08:03,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:08:03,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:08:03,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:08:03,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:08:03,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:08:03,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:08:03,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:08:03,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:08:03,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:08:03,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:08:03,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:08:03,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:08:03,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:08:03,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:08:03,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:08:03,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:08:03,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:08:03,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:08:03,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:08:03,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:08:03,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:08:03,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:08:03,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:08:03,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:08:03,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:08:03,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:08:03,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:08:03,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:08:03,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:08:03,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:08:03,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:08:03,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:08:03,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:08:03,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:08:03,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:08:03,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:08:03,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:08:03,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:08:03,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:08:03,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:08:03,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:08:03,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:08:03,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:08:03,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:08:03,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:08:03,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:08:03,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:08:03,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:08:03,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:08:03,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:08:03,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:08:03,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:08:03,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:08:03,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:08:03,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:08:03,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:08:03,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:08:03,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:08:03,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:08:03,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:08:03,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:08:03,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:08:03,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:08:03,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:08:03,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:08:03,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:08:03,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:08:03,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:08:03,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:08:03,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:08:03,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:08:03,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:08:03,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:08:03,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:08:03,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:08:03,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f [2021-12-15 22:08:03,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:08:03,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:08:03,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:08:03,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:08:03,744 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:08:03,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label48.c [2021-12-15 22:08:03,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0625b6c84/ba6f291d53e24e849b28d3200a18a41a/FLAG57ce65cb4 [2021-12-15 22:08:04,360 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:08:04,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label48.c [2021-12-15 22:08:04,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0625b6c84/ba6f291d53e24e849b28d3200a18a41a/FLAG57ce65cb4 [2021-12-15 22:08:04,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0625b6c84/ba6f291d53e24e849b28d3200a18a41a [2021-12-15 22:08:04,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:08:04,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:08:04,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:08:04,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:08:04,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:08:04,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:04" (1/1) ... [2021-12-15 22:08:04,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a89dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:04, skipping insertion in model container [2021-12-15 22:08:04,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:08:04" (1/1) ... [2021-12-15 22:08:04,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:08:04,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:08:05,369 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2021-12-15 22:08:05,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:08:05,406 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:08:05,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2021-12-15 22:08:05,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:08:05,722 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:08:05,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05 WrapperNode [2021-12-15 22:08:05,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:08:05,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:08:05,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:08:05,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:08:05,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,870 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 22:08:05,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:08:05,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:08:05,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:08:05,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:08:05,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:05,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:08:05,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:08:05,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:08:05,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:08:05,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (1/1) ... [2021-12-15 22:08:06,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:08:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:06,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 22:08:06,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 22:08:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:08:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:08:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:08:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:08:06,125 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:08:06,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:08:07,464 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:08:07,472 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:08:07,473 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:08:07,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:07 BoogieIcfgContainer [2021-12-15 22:08:07,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:08:07,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:08:07,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:08:07,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:08:07,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:08:04" (1/3) ... [2021-12-15 22:08:07,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a01876a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:07, skipping insertion in model container [2021-12-15 22:08:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:08:05" (2/3) ... [2021-12-15 22:08:07,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a01876a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:08:07, skipping insertion in model container [2021-12-15 22:08:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:08:07" (3/3) ... [2021-12-15 22:08:07,483 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label48.c [2021-12-15 22:08:07,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:08:07,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:08:07,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:08:07,535 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 22:08:07,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:08:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-15 22:08:07,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:07,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:07,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash -819677325, now seen corresponding path program 1 times [2021-12-15 22:08:07,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:07,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662495486] [2021-12-15 22:08:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:07,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:08,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:08,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662495486] [2021-12-15 22:08:08,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662495486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:08,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:08,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:08,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048522890] [2021-12-15 22:08:08,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:08,083 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:09,001 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2021-12-15 22:08:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-12-15 22:08:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:09,015 INFO L225 Difference]: With dead ends: 860 [2021-12-15 22:08:09,016 INFO L226 Difference]: Without dead ends: 465 [2021-12-15 22:08:09,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:09,023 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 121 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:09,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:08:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-15 22:08:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2021-12-15 22:08:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.556768558951965) internal successors, (713), 458 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2021-12-15 22:08:09,079 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 183 [2021-12-15 22:08:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2021-12-15 22:08:09,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2021-12-15 22:08:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 22:08:09,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:09,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:09,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:08:09,086 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1598798580, now seen corresponding path program 1 times [2021-12-15 22:08:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884794637] [2021-12-15 22:08:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:09,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:09,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884794637] [2021-12-15 22:08:09,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884794637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:09,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:09,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:09,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129299334] [2021-12-15 22:08:09,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:09,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:09,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:09,232 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:10,020 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2021-12-15 22:08:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-15 22:08:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:10,025 INFO L225 Difference]: With dead ends: 1343 [2021-12-15 22:08:10,025 INFO L226 Difference]: Without dead ends: 886 [2021-12-15 22:08:10,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:10,028 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:10,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 89 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:08:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-15 22:08:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2021-12-15 22:08:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5340253748558246) internal successors, (1330), 867 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1330 transitions. [2021-12-15 22:08:10,069 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1330 transitions. Word has length 191 [2021-12-15 22:08:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:10,071 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1330 transitions. [2021-12-15 22:08:10,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1330 transitions. [2021-12-15 22:08:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-15 22:08:10,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:10,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:10,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:08:10,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1173366829, now seen corresponding path program 1 times [2021-12-15 22:08:10,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881646441] [2021-12-15 22:08:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:10,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:10,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881646441] [2021-12-15 22:08:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881646441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:10,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:10,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:10,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977733985] [2021-12-15 22:08:10,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:10,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:10,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:10,200 INFO L87 Difference]: Start difference. First operand 868 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:10,910 INFO L93 Difference]: Finished difference Result 2565 states and 3941 transitions. [2021-12-15 22:08:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-12-15 22:08:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:10,917 INFO L225 Difference]: With dead ends: 2565 [2021-12-15 22:08:10,917 INFO L226 Difference]: Without dead ends: 1699 [2021-12-15 22:08:10,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:10,919 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 232 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 149 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-12-15 22:08:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1694. [2021-12-15 22:08:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 1.4589486119314825) internal successors, (2470), 1693 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2470 transitions. [2021-12-15 22:08:10,956 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2470 transitions. Word has length 192 [2021-12-15 22:08:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:10,957 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 2470 transitions. [2021-12-15 22:08:10,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2470 transitions. [2021-12-15 22:08:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-15 22:08:10,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:10,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:10,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:08:10,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash -531252135, now seen corresponding path program 1 times [2021-12-15 22:08:10,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:10,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333596177] [2021-12-15 22:08:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:10,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:11,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:11,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333596177] [2021-12-15 22:08:11,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333596177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:11,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:11,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:11,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839530488] [2021-12-15 22:08:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:11,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:11,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,037 INFO L87 Difference]: Start difference. First operand 1694 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:11,764 INFO L93 Difference]: Finished difference Result 4223 states and 6140 transitions. [2021-12-15 22:08:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-12-15 22:08:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:11,772 INFO L225 Difference]: With dead ends: 4223 [2021-12-15 22:08:11,773 INFO L226 Difference]: Without dead ends: 2531 [2021-12-15 22:08:11,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,775 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:11,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 169 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-12-15 22:08:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2522. [2021-12-15 22:08:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.437524791749306) internal successors, (3624), 2521 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3624 transitions. [2021-12-15 22:08:11,824 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3624 transitions. Word has length 193 [2021-12-15 22:08:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 3624 transitions. [2021-12-15 22:08:11,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3624 transitions. [2021-12-15 22:08:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 22:08:11,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:11,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:11,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:08:11,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:11,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1710983614, now seen corresponding path program 1 times [2021-12-15 22:08:11,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:11,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528442468] [2021-12-15 22:08:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:11,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:11,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:11,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528442468] [2021-12-15 22:08:11,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528442468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:11,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:11,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956068058] [2021-12-15 22:08:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:11,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:11,917 INFO L87 Difference]: Start difference. First operand 2522 states and 3624 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:12,741 INFO L93 Difference]: Finished difference Result 7531 states and 10826 transitions. [2021-12-15 22:08:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-12-15 22:08:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:12,758 INFO L225 Difference]: With dead ends: 7531 [2021-12-15 22:08:12,759 INFO L226 Difference]: Without dead ends: 5011 [2021-12-15 22:08:12,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:12,764 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 286 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:12,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 98 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:08:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-12-15 22:08:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 5006. [2021-12-15 22:08:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 5005 states have (on average 1.406993006993007) internal successors, (7042), 5005 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 7042 transitions. [2021-12-15 22:08:12,861 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 7042 transitions. Word has length 195 [2021-12-15 22:08:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 5006 states and 7042 transitions. [2021-12-15 22:08:12,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 7042 transitions. [2021-12-15 22:08:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 22:08:12,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:12,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:12,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:08:12,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash 659580043, now seen corresponding path program 1 times [2021-12-15 22:08:12,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:12,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058619620] [2021-12-15 22:08:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:12,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 22:08:12,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:12,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058619620] [2021-12-15 22:08:12,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058619620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:12,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:12,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:12,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219689190] [2021-12-15 22:08:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:12,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:12,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:12,950 INFO L87 Difference]: Start difference. First operand 5006 states and 7042 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:13,724 INFO L93 Difference]: Finished difference Result 14973 states and 21075 transitions. [2021-12-15 22:08:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-12-15 22:08:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:13,761 INFO L225 Difference]: With dead ends: 14973 [2021-12-15 22:08:13,762 INFO L226 Difference]: Without dead ends: 9969 [2021-12-15 22:08:13,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:13,775 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:13,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 190 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:13,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9969 states. [2021-12-15 22:08:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9969 to 9952. [2021-12-15 22:08:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 1.3946337051552609) internal successors, (13878), 9951 states have internal predecessors, (13878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 13878 transitions. [2021-12-15 22:08:14,006 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 13878 transitions. Word has length 199 [2021-12-15 22:08:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 13878 transitions. [2021-12-15 22:08:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 13878 transitions. [2021-12-15 22:08:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 22:08:14,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:14,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:08:14,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1371073778, now seen corresponding path program 1 times [2021-12-15 22:08:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:14,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174175154] [2021-12-15 22:08:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:14,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:08:14,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:14,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174175154] [2021-12-15 22:08:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174175154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:14,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524271296] [2021-12-15 22:08:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:14,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:14,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:14,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:08:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:08:14,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524271296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:14,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:14,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:14,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980816379] [2021-12-15 22:08:14,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:14,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:14,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:14,825 INFO L87 Difference]: Start difference. First operand 9952 states and 13878 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:15,658 INFO L93 Difference]: Finished difference Result 28285 states and 39523 transitions. [2021-12-15 22:08:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:15,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-12-15 22:08:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:15,711 INFO L225 Difference]: With dead ends: 28285 [2021-12-15 22:08:15,711 INFO L226 Difference]: Without dead ends: 18335 [2021-12-15 22:08:15,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:15,726 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 73 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:15,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 168 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-12-15 22:08:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 18329. [2021-12-15 22:08:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 18328 states have (on average 1.3522479266695766) internal successors, (24784), 18328 states have internal predecessors, (24784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 24784 transitions. [2021-12-15 22:08:16,058 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 24784 transitions. Word has length 200 [2021-12-15 22:08:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:16,059 INFO L470 AbstractCegarLoop]: Abstraction has 18329 states and 24784 transitions. [2021-12-15 22:08:16,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 24784 transitions. [2021-12-15 22:08:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-15 22:08:16,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:16,083 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:16,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:16,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:16,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:16,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1302688565, now seen corresponding path program 1 times [2021-12-15 22:08:16,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:16,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617505044] [2021-12-15 22:08:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:16,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 22:08:16,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617505044] [2021-12-15 22:08:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617505044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459648111] [2021-12-15 22:08:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:16,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:16,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:16,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:08:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:08:16,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:16,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459648111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:16,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:16,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:16,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464162352] [2021-12-15 22:08:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:16,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:16,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:16,918 INFO L87 Difference]: Start difference. First operand 18329 states and 24784 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:17,817 INFO L93 Difference]: Finished difference Result 43610 states and 59546 transitions. [2021-12-15 22:08:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:17,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-12-15 22:08:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:17,875 INFO L225 Difference]: With dead ends: 43610 [2021-12-15 22:08:17,875 INFO L226 Difference]: Without dead ends: 25892 [2021-12-15 22:08:17,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:17,898 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 241 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:17,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 168 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25892 states. [2021-12-15 22:08:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25892 to 22421. [2021-12-15 22:08:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22421 states, 22420 states have (on average 1.339206066012489) internal successors, (30025), 22420 states have internal predecessors, (30025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22421 states to 22421 states and 30025 transitions. [2021-12-15 22:08:18,269 INFO L78 Accepts]: Start accepts. Automaton has 22421 states and 30025 transitions. Word has length 223 [2021-12-15 22:08:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:18,269 INFO L470 AbstractCegarLoop]: Abstraction has 22421 states and 30025 transitions. [2021-12-15 22:08:18,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 22421 states and 30025 transitions. [2021-12-15 22:08:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 22:08:18,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:18,296 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:18,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-15 22:08:18,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1289345724, now seen corresponding path program 1 times [2021-12-15 22:08:18,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929546786] [2021-12-15 22:08:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:18,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 22:08:18,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:18,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929546786] [2021-12-15 22:08:18,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929546786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:18,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:18,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:18,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769550492] [2021-12-15 22:08:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:18,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:18,619 INFO L87 Difference]: Start difference. First operand 22421 states and 30025 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:19,483 INFO L93 Difference]: Finished difference Result 44808 states and 59998 transitions. [2021-12-15 22:08:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-15 22:08:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:19,525 INFO L225 Difference]: With dead ends: 44808 [2021-12-15 22:08:19,525 INFO L226 Difference]: Without dead ends: 22389 [2021-12-15 22:08:19,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:19,546 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 251 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:19,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 373 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22389 states. [2021-12-15 22:08:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22389 to 22381. [2021-12-15 22:08:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22381 states, 22380 states have (on average 1.2611260053619302) internal successors, (28224), 22380 states have internal predecessors, (28224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22381 states to 22381 states and 28224 transitions. [2021-12-15 22:08:19,882 INFO L78 Accepts]: Start accepts. Automaton has 22381 states and 28224 transitions. Word has length 225 [2021-12-15 22:08:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:19,882 INFO L470 AbstractCegarLoop]: Abstraction has 22381 states and 28224 transitions. [2021-12-15 22:08:19,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 22381 states and 28224 transitions. [2021-12-15 22:08:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-15 22:08:19,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:19,908 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:19,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:08:19,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 412778088, now seen corresponding path program 1 times [2021-12-15 22:08:19,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540583323] [2021-12-15 22:08:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:19,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 22:08:20,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540583323] [2021-12-15 22:08:20,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540583323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:20,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845027556] [2021-12-15 22:08:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:20,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:20,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:20,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:08:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:20,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 22:08:20,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845027556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:20,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:20,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:20,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60793977] [2021-12-15 22:08:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:20,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:20,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:20,619 INFO L87 Difference]: Start difference. First operand 22381 states and 28224 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:21,547 INFO L93 Difference]: Finished difference Result 60793 states and 76894 transitions. [2021-12-15 22:08:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-12-15 22:08:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:21,609 INFO L225 Difference]: With dead ends: 60793 [2021-12-15 22:08:21,610 INFO L226 Difference]: Without dead ends: 38414 [2021-12-15 22:08:21,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:21,632 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 57 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:21,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 410 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38414 states. [2021-12-15 22:08:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38414 to 36579. [2021-12-15 22:08:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36579 states, 36578 states have (on average 1.1839356990540761) internal successors, (43306), 36578 states have internal predecessors, (43306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36579 states to 36579 states and 43306 transitions. [2021-12-15 22:08:22,181 INFO L78 Accepts]: Start accepts. Automaton has 36579 states and 43306 transitions. Word has length 228 [2021-12-15 22:08:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:22,182 INFO L470 AbstractCegarLoop]: Abstraction has 36579 states and 43306 transitions. [2021-12-15 22:08:22,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36579 states and 43306 transitions. [2021-12-15 22:08:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 22:08:22,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:22,220 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:22,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 22:08:22,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:22,444 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash 10927320, now seen corresponding path program 1 times [2021-12-15 22:08:22,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773766515] [2021-12-15 22:08:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:22,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 22:08:22,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:22,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773766515] [2021-12-15 22:08:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773766515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:22,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:22,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:22,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487837172] [2021-12-15 22:08:22,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:22,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:22,549 INFO L87 Difference]: Start difference. First operand 36579 states and 43306 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:23,497 INFO L93 Difference]: Finished difference Result 84227 states and 99712 transitions. [2021-12-15 22:08:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-12-15 22:08:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:23,568 INFO L225 Difference]: With dead ends: 84227 [2021-12-15 22:08:23,568 INFO L226 Difference]: Without dead ends: 47650 [2021-12-15 22:08:23,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:23,605 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 199 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:23,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 208 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47650 states. [2021-12-15 22:08:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47650 to 47622. [2021-12-15 22:08:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47622 states, 47621 states have (on average 1.1778207093509165) internal successors, (56089), 47621 states have internal predecessors, (56089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47622 states to 47622 states and 56089 transitions. [2021-12-15 22:08:24,463 INFO L78 Accepts]: Start accepts. Automaton has 47622 states and 56089 transitions. Word has length 262 [2021-12-15 22:08:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:24,463 INFO L470 AbstractCegarLoop]: Abstraction has 47622 states and 56089 transitions. [2021-12-15 22:08:24,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 47622 states and 56089 transitions. [2021-12-15 22:08:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-15 22:08:24,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:24,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:24,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:08:24,503 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:24,503 INFO L85 PathProgramCache]: Analyzing trace with hash 722825007, now seen corresponding path program 1 times [2021-12-15 22:08:24,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:24,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396329520] [2021-12-15 22:08:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:24,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 22:08:24,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:24,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396329520] [2021-12-15 22:08:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396329520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:24,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:24,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540210434] [2021-12-15 22:08:24,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:24,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:24,596 INFO L87 Difference]: Start difference. First operand 47622 states and 56089 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:25,556 INFO L93 Difference]: Finished difference Result 99927 states and 117390 transitions. [2021-12-15 22:08:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-12-15 22:08:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:25,622 INFO L225 Difference]: With dead ends: 99927 [2021-12-15 22:08:25,622 INFO L226 Difference]: Without dead ends: 52713 [2021-12-15 22:08:25,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:25,649 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 199 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:25,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 185 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52713 states. [2021-12-15 22:08:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52713 to 52494. [2021-12-15 22:08:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52494 states, 52493 states have (on average 1.170022669689292) internal successors, (61418), 52493 states have internal predecessors, (61418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52494 states to 52494 states and 61418 transitions. [2021-12-15 22:08:26,577 INFO L78 Accepts]: Start accepts. Automaton has 52494 states and 61418 transitions. Word has length 265 [2021-12-15 22:08:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:26,577 INFO L470 AbstractCegarLoop]: Abstraction has 52494 states and 61418 transitions. [2021-12-15 22:08:26,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 52494 states and 61418 transitions. [2021-12-15 22:08:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-15 22:08:26,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:26,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:26,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:08:26,620 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash -529565885, now seen corresponding path program 1 times [2021-12-15 22:08:26,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:26,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282748956] [2021-12-15 22:08:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:26,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 97 proven. 6 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-15 22:08:26,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282748956] [2021-12-15 22:08:26,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282748956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410487179] [2021-12-15 22:08:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:26,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:26,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:26,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 22:08:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-15 22:08:27,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:27,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410487179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:27,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:27,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:27,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55183177] [2021-12-15 22:08:27,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:27,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:27,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:27,151 INFO L87 Difference]: Start difference. First operand 52494 states and 61418 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:28,132 INFO L93 Difference]: Finished difference Result 125486 states and 148746 transitions. [2021-12-15 22:08:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-12-15 22:08:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:28,232 INFO L225 Difference]: With dead ends: 125486 [2021-12-15 22:08:28,232 INFO L226 Difference]: Without dead ends: 74415 [2021-12-15 22:08:28,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:28,276 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 232 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:28,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 166 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74415 states. [2021-12-15 22:08:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74415 to 72578. [2021-12-15 22:08:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72578 states, 72577 states have (on average 1.1467131460380011) internal successors, (83225), 72577 states have internal predecessors, (83225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72578 states to 72578 states and 83225 transitions. [2021-12-15 22:08:29,300 INFO L78 Accepts]: Start accepts. Automaton has 72578 states and 83225 transitions. Word has length 269 [2021-12-15 22:08:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:29,301 INFO L470 AbstractCegarLoop]: Abstraction has 72578 states and 83225 transitions. [2021-12-15 22:08:29,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 72578 states and 83225 transitions. [2021-12-15 22:08:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-12-15 22:08:29,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:29,335 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:29,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 22:08:29,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:29,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1782773943, now seen corresponding path program 1 times [2021-12-15 22:08:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:29,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099470744] [2021-12-15 22:08:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:29,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 123 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 22:08:29,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099470744] [2021-12-15 22:08:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099470744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520937757] [2021-12-15 22:08:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:29,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:29,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:29,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 22:08:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 22:08:30,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:30,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520937757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:30,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:30,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 22:08:30,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735448193] [2021-12-15 22:08:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:30,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:30,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:30,372 INFO L87 Difference]: Start difference. First operand 72578 states and 83225 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:31,491 INFO L93 Difference]: Finished difference Result 134746 states and 154384 transitions. [2021-12-15 22:08:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-12-15 22:08:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:31,616 INFO L225 Difference]: With dead ends: 134746 [2021-12-15 22:08:31,616 INFO L226 Difference]: Without dead ends: 63794 [2021-12-15 22:08:31,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:08:31,631 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 233 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:31,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 386 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63794 states. [2021-12-15 22:08:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63794 to 59718. [2021-12-15 22:08:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59718 states, 59717 states have (on average 1.1294941139039134) internal successors, (67450), 59717 states have internal predecessors, (67450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59718 states to 59718 states and 67450 transitions. [2021-12-15 22:08:32,363 INFO L78 Accepts]: Start accepts. Automaton has 59718 states and 67450 transitions. Word has length 295 [2021-12-15 22:08:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:32,364 INFO L470 AbstractCegarLoop]: Abstraction has 59718 states and 67450 transitions. [2021-12-15 22:08:32,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 59718 states and 67450 transitions. [2021-12-15 22:08:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 22:08:32,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:32,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:32,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:32,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 22:08:32,764 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1907237817, now seen corresponding path program 1 times [2021-12-15 22:08:32,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:32,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282807492] [2021-12-15 22:08:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:32,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 22:08:32,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282807492] [2021-12-15 22:08:32,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282807492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:32,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:32,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:08:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006676705] [2021-12-15 22:08:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:32,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:32,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:32,882 INFO L87 Difference]: Start difference. First operand 59718 states and 67450 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:33,872 INFO L93 Difference]: Finished difference Result 124151 states and 140528 transitions. [2021-12-15 22:08:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-15 22:08:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:33,951 INFO L225 Difference]: With dead ends: 124151 [2021-12-15 22:08:33,951 INFO L226 Difference]: Without dead ends: 65653 [2021-12-15 22:08:33,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:08:33,990 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 159 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:33,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 228 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65653 states. [2021-12-15 22:08:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65653 to 61748. [2021-12-15 22:08:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61748 states, 61747 states have (on average 1.1320226083858325) internal successors, (69899), 61747 states have internal predecessors, (69899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61748 states to 61748 states and 69899 transitions. [2021-12-15 22:08:34,999 INFO L78 Accepts]: Start accepts. Automaton has 61748 states and 69899 transitions. Word has length 321 [2021-12-15 22:08:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 61748 states and 69899 transitions. [2021-12-15 22:08:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 61748 states and 69899 transitions. [2021-12-15 22:08:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-15 22:08:35,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:35,027 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:35,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:08:35,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1242305419, now seen corresponding path program 1 times [2021-12-15 22:08:35,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:35,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559221261] [2021-12-15 22:08:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:35,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 146 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 22:08:35,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559221261] [2021-12-15 22:08:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559221261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:35,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485515397] [2021-12-15 22:08:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:35,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:35,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:35,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 22:08:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:08:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 22:08:35,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:35,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485515397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:35,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:35,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:08:35,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696121384] [2021-12-15 22:08:35,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:35,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:35,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:35,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:35,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:35,879 INFO L87 Difference]: Start difference. First operand 61748 states and 69899 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:36,882 INFO L93 Difference]: Finished difference Result 120452 states and 136386 transitions. [2021-12-15 22:08:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2021-12-15 22:08:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:36,948 INFO L225 Difference]: With dead ends: 120452 [2021-12-15 22:08:36,949 INFO L226 Difference]: Without dead ends: 59924 [2021-12-15 22:08:36,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:36,972 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 87 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:36,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:08:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59924 states. [2021-12-15 22:08:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59924 to 57887. [2021-12-15 22:08:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57887 states, 57886 states have (on average 1.1218602079950246) internal successors, (64940), 57886 states have internal predecessors, (64940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57887 states to 57887 states and 64940 transitions. [2021-12-15 22:08:37,762 INFO L78 Accepts]: Start accepts. Automaton has 57887 states and 64940 transitions. Word has length 326 [2021-12-15 22:08:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:37,763 INFO L470 AbstractCegarLoop]: Abstraction has 57887 states and 64940 transitions. [2021-12-15 22:08:37,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57887 states and 64940 transitions. [2021-12-15 22:08:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-15 22:08:37,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:37,802 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:37,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 22:08:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 22:08:38,003 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1906696184, now seen corresponding path program 1 times [2021-12-15 22:08:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491204586] [2021-12-15 22:08:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:38,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 178 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 22:08:38,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491204586] [2021-12-15 22:08:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491204586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425968470] [2021-12-15 22:08:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:38,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:38,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:38,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 22:08:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 22:08:39,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425968470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:39,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:39,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:08:39,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350881771] [2021-12-15 22:08:39,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:39,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:39,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:39,058 INFO L87 Difference]: Start difference. First operand 57887 states and 64940 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:40,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:40,151 INFO L93 Difference]: Finished difference Result 128974 states and 144976 transitions. [2021-12-15 22:08:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:40,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2021-12-15 22:08:40,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:40,235 INFO L225 Difference]: With dead ends: 128974 [2021-12-15 22:08:40,235 INFO L226 Difference]: Without dead ends: 72307 [2021-12-15 22:08:40,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:40,273 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 159 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:40,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 190 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:08:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72307 states. [2021-12-15 22:08:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72307 to 72097. [2021-12-15 22:08:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72097 states, 72096 states have (on average 1.1191050821127386) internal successors, (80683), 72096 states have internal predecessors, (80683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72097 states to 72097 states and 80683 transitions. [2021-12-15 22:08:41,169 INFO L78 Accepts]: Start accepts. Automaton has 72097 states and 80683 transitions. Word has length 351 [2021-12-15 22:08:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:41,169 INFO L470 AbstractCegarLoop]: Abstraction has 72097 states and 80683 transitions. [2021-12-15 22:08:41,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72097 states and 80683 transitions. [2021-12-15 22:08:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-15 22:08:41,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:41,205 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:41,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:41,406 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1576946926, now seen corresponding path program 1 times [2021-12-15 22:08:41,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:41,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125555461] [2021-12-15 22:08:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:41,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 182 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 22:08:41,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125555461] [2021-12-15 22:08:41,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125555461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:41,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017200227] [2021-12-15 22:08:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:41,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:41,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:41,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 22:08:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:42,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-15 22:08:42,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:42,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017200227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:42,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:42,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 22:08:42,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873590612] [2021-12-15 22:08:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:42,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:42,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:42,496 INFO L87 Difference]: Start difference. First operand 72097 states and 80683 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:43,129 INFO L93 Difference]: Finished difference Result 142972 states and 160046 transitions. [2021-12-15 22:08:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-12-15 22:08:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:43,221 INFO L225 Difference]: With dead ends: 142972 [2021-12-15 22:08:43,222 INFO L226 Difference]: Without dead ends: 72095 [2021-12-15 22:08:43,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:43,273 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 315 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:43,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 53 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:08:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72095 states. [2021-12-15 22:08:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72095 to 72095. [2021-12-15 22:08:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72095 states, 72094 states have (on average 1.1190529031542154) internal successors, (80677), 72094 states have internal predecessors, (80677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72095 states to 72095 states and 80677 transitions. [2021-12-15 22:08:44,372 INFO L78 Accepts]: Start accepts. Automaton has 72095 states and 80677 transitions. Word has length 355 [2021-12-15 22:08:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:44,372 INFO L470 AbstractCegarLoop]: Abstraction has 72095 states and 80677 transitions. [2021-12-15 22:08:44,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72095 states and 80677 transitions. [2021-12-15 22:08:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-15 22:08:44,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:44,418 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:44,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 22:08:44,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 22:08:44,619 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:44,620 INFO L85 PathProgramCache]: Analyzing trace with hash 124498615, now seen corresponding path program 1 times [2021-12-15 22:08:44,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:44,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051571374] [2021-12-15 22:08:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:44,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 196 proven. 6 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-15 22:08:45,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051571374] [2021-12-15 22:08:45,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051571374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331103087] [2021-12-15 22:08:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:45,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:45,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:45,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:45,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 22:08:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-15 22:08:45,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331103087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:45,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:45,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:08:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487895032] [2021-12-15 22:08:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:45,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:45,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:45,804 INFO L87 Difference]: Start difference. First operand 72095 states and 80677 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:46,624 INFO L93 Difference]: Finished difference Result 129336 states and 144780 transitions. [2021-12-15 22:08:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2021-12-15 22:08:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:46,704 INFO L225 Difference]: With dead ends: 129336 [2021-12-15 22:08:46,705 INFO L226 Difference]: Without dead ends: 58461 [2021-12-15 22:08:46,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:46,746 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 266 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:46,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 369 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:08:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58461 states. [2021-12-15 22:08:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58461 to 57038. [2021-12-15 22:08:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57038 states, 57037 states have (on average 1.101618247804057) internal successors, (62833), 57037 states have internal predecessors, (62833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57038 states to 57038 states and 62833 transitions. [2021-12-15 22:08:47,592 INFO L78 Accepts]: Start accepts. Automaton has 57038 states and 62833 transitions. Word has length 364 [2021-12-15 22:08:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:47,592 INFO L470 AbstractCegarLoop]: Abstraction has 57038 states and 62833 transitions. [2021-12-15 22:08:47,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 57038 states and 62833 transitions. [2021-12-15 22:08:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-15 22:08:47,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:47,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:47,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-15 22:08:47,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:47,828 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1886194626, now seen corresponding path program 1 times [2021-12-15 22:08:47,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:47,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774926888] [2021-12-15 22:08:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:47,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:08:47,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774926888] [2021-12-15 22:08:47,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774926888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:47,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:08:47,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:08:47,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422511630] [2021-12-15 22:08:47,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:47,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:08:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:08:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:47,973 INFO L87 Difference]: Start difference. First operand 57038 states and 62833 transitions. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:49,173 INFO L93 Difference]: Finished difference Result 145192 states and 159643 transitions. [2021-12-15 22:08:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:08:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2021-12-15 22:08:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:49,283 INFO L225 Difference]: With dead ends: 145192 [2021-12-15 22:08:49,283 INFO L226 Difference]: Without dead ends: 89374 [2021-12-15 22:08:49,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:08:49,317 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 803 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:49,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 46 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:08:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89374 states. [2021-12-15 22:08:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89374 to 87126. [2021-12-15 22:08:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87126 states, 87125 states have (on average 1.088286944045911) internal successors, (94817), 87125 states have internal predecessors, (94817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87126 states to 87126 states and 94817 transitions. [2021-12-15 22:08:50,597 INFO L78 Accepts]: Start accepts. Automaton has 87126 states and 94817 transitions. Word has length 364 [2021-12-15 22:08:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:50,597 INFO L470 AbstractCegarLoop]: Abstraction has 87126 states and 94817 transitions. [2021-12-15 22:08:50,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 87126 states and 94817 transitions. [2021-12-15 22:08:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-15 22:08:50,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:50,643 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:50,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:08:50,643 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash -571504765, now seen corresponding path program 1 times [2021-12-15 22:08:50,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:50,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188701847] [2021-12-15 22:08:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:50,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 203 proven. 6 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-15 22:08:50,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188701847] [2021-12-15 22:08:50,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188701847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:50,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226397728] [2021-12-15 22:08:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:50,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:50,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:50,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:50,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 22:08:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 22:08:51,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226397728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:51,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:51,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:08:51,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524186165] [2021-12-15 22:08:51,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:51,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:51,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:51,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:51,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:51,750 INFO L87 Difference]: Start difference. First operand 87126 states and 94817 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:52,482 INFO L93 Difference]: Finished difference Result 228762 states and 249257 transitions. [2021-12-15 22:08:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 370 [2021-12-15 22:08:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:08:52,652 INFO L225 Difference]: With dead ends: 228762 [2021-12-15 22:08:52,652 INFO L226 Difference]: Without dead ends: 142856 [2021-12-15 22:08:52,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:52,718 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 299 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:08:52,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 838 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 22:08:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142856 states. [2021-12-15 22:08:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142856 to 140414. [2021-12-15 22:08:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140414 states, 140413 states have (on average 1.081103601518378) internal successors, (151801), 140413 states have internal predecessors, (151801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140414 states to 140414 states and 151801 transitions. [2021-12-15 22:08:54,956 INFO L78 Accepts]: Start accepts. Automaton has 140414 states and 151801 transitions. Word has length 370 [2021-12-15 22:08:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:08:54,957 INFO L470 AbstractCegarLoop]: Abstraction has 140414 states and 151801 transitions. [2021-12-15 22:08:54,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 140414 states and 151801 transitions. [2021-12-15 22:08:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-15 22:08:55,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:08:55,040 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:08:55,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 22:08:55,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 22:08:55,241 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:08:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:08:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash -112319003, now seen corresponding path program 1 times [2021-12-15 22:08:55,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:08:55,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17644981] [2021-12-15 22:08:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:55,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:08:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 215 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-15 22:08:55,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:08:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17644981] [2021-12-15 22:08:55,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17644981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:08:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428533233] [2021-12-15 22:08:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:08:55,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:08:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:08:55,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:08:55,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 22:08:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:08:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:08:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:08:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-15 22:08:56,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:08:56,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428533233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:08:56,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:08:56,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 22:08:56,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245820239] [2021-12-15 22:08:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:08:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:08:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:08:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:08:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:08:56,596 INFO L87 Difference]: Start difference. First operand 140414 states and 151801 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:08:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:08:58,389 INFO L93 Difference]: Finished difference Result 315398 states and 341765 transitions. [2021-12-15 22:08:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:08:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-12-15 22:08:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted.